This website has a tool that supposedly shows the “page strength” of your website (think overall popularity and exposure). A good tool to get some info on how many links and references there are out there to your website (they compile things like who’s linking to your site, Wikipedia references, what types of sites are referencing you, etc.). They have a few other tools also, but most require you to pay $$$ to use them.

Link: http://www.seomoz.org/page-strength